Analog Devices ADSP-BF53x Blackfin, Reference

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ADSP-BF53x/BF56x Blackfin Processor Programming Reference 19-53
Vector Operations
LSETUP (loop_, loop_) LC0=P1>>1 ; /* set up the loop */
loop_: (r1,r0) = SEARCH R2 (LE) || R2=[P0++];
/* search for the last minimum in all but the
last element of the array */
(r1,r0) = SEARCH R2 (LE);
/* finally, search the last element */
/* The lower 16 bits of A1 and A0 contain the last minimums of the
array. R1 contains the value of P0 corresponding to the value in
A1. R0 contains the value of P0 corresponding to the value in A0.
Next, compare A1 and A0 together and R1 and R0 together to find
the single, last minimum in the array.
Note: In this example, the resulting pointers are past the actual
surviving array element due to the post-increment operation. */
cc = a0 <= a1 ;
r0 += -4 ;
r1 += -2 ;
if !cc r0 = r1 ; /* the pointer to the survivor is in r0 */
Also See
Vector MAX , Vector MIN , MAX , MIN
Special Applications
This instruction is used in a loop to locate an element in a vector accord-
ing to the element’s value.